CVE-2025-39996 media: b2c2: Fix use-after-free causing by irq_check_work in flexcop_pci_remove

In the Linux kernel, the following vulnerability has been resolved: media: b2c2: Fix use-after-free causing by irqcheckwork in flexcoppciremove The original code uses canceldelayedwork in flexcoppciremove, which does not guarantee that the delayed work item irqcheckwork has fully completed if it...